Yes, I have some. I like them, except Sonny Clark - Cool Struttin, which I thought sounded terrible.
I have had a chat with one of the people who worked on the series in Japan. Quoting:
"Some of my engineer colleagues gave specific feedback to Gray's team that the bass should mastered a bit down on these because of the resonant, thin construction of Japanese apartments. This was especially the case on Moanin'. I disagreed with them, but I can speak for the integrity of the process.
I can assure you they are from the Master Tapes, as EMI owns said master tapes, and they also own Disk Union.
These are absolutely not designed for the American or European listening room. That said, they are perfect for us who live on this side of the world."
There you have it - straight from the source!
I love the ones I have - 4 Wayne Shorter, Maiden Voyage, Dippin, Blues Walk etc.